are automatic trans parts balance critical?

[neal zimmerman <neal.zimmerman@xxxxxxxxx>]

Im putting together a 1974 727TF  that came from a 1974 dodge  truck 

with a 440. So yes by 1974, that 440 was most surely a cast crank external balance motor. But, of course  , several parts are bad and I have two other BB  trannies to pull parts from to create a frankenstein, a 1967 and a 1969, both of which were most likely steel crank/internally balanced  motors.  For instance the rear drum  is toasted but I have a real nice rear drum  from the 1969 transmission I want to stick in there. But the 74 drum has 5 holes drilled all the way through it and the 69 drum has three holes partially drilled into it, but not through. Is this an issue?? 

   Thanks all.

    Neal ZImmerman, Eugene Oregon

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